Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Robert S. Ball
Sir Norman Lockyer
Edward Luther Stevenson
Emmeline M. Plunket
Camille Flammarion and J. F. Blake
M. A. Orr
Sir Thomas Little Heath
George Grote
Alfred Noyes
Sir E. Ray Lankester
Friedrich Blass
August Heinrich Christian Gelpke
Karl Bohlin
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.